Publish harness and TUI open-source

initial sync from the monorepo

crates/codegen/xai-grok-pager/src/startup.rs

@@ -0,0 +1,28 @@
+//! Generic startup warnings displayed on the welcome screen.
+//!
+//! Any subsystem (terminal diagnostics, auth, config migration, etc.) can
+//! produce [`StartupWarning`]s.
+
+/// A non-fatal startup warning from any subsystem.
+///
+/// This is a **display contract only** -- the subsystem formats the message
+/// and optional action hint. Detailed diagnostics (fix commands, config paths)
+/// live in the subsystem-specific slash commands (e.g. `/terminal-setup`).
+#[derive(Debug, Clone)]
+pub struct StartupWarning {
+    /// Severity controls rendering color (yellow for warnings, dim for info).
+    pub severity: WarningSeverity,
+    /// Short, user-facing message (fits in ~60 columns).
+    pub message: String,
+    /// Optional action hint (e.g. "run /terminal-setup").
+    pub action: Option<String>,
+}
+
+/// Severity level for startup warnings.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum WarningSeverity {
+    /// Rendered in warning color (yellow). Something is misconfigured.
+    Warning,
+    /// Rendered in dim/gray. Informational, not actionable.
+    Info,
+}